tcpip.c revision 46550
1/* 2 * $Id: tcpip.c,v 1.76 1999/05/06 11:03:18 jkh Exp $ 3 * 4 * Copyright (c) 1995 5 * Gary J Palmer. All rights reserved. 6 * Copyright (c) 1996 7 * Jordan K. Hubbard. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer, 14 * verbatim and that no modifications are made prior to this 15 * point in the file. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 25 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 26 * OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 27 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 28 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33/* 34 * All kinds of hacking also performed by jkh on this code. Don't 35 * blame Gary for every bogosity you see here.. :-) 36 * 37 * -jkh 38 */ 39 40#include "sysinstall.h" 41#include <sys/param.h> 42 43/* The help file for the TCP/IP setup screen */ 44#define TCP_HELPFILE "tcp" 45 46/* These are nasty, but they make the layout structure a lot easier ... */ 47 48static char hostname[HOSTNAME_FIELD_LEN], domainname[HOSTNAME_FIELD_LEN], 49 gateway[IPADDR_FIELD_LEN], nameserver[IPADDR_FIELD_LEN]; 50static int okbutton, cancelbutton; 51static char ipaddr[IPADDR_FIELD_LEN], netmask[IPADDR_FIELD_LEN], extras[EXTRAS_FIELD_LEN]; 52 53/* What the screen size is meant to be */ 54#define TCP_DIALOG_Y 0 55#define TCP_DIALOG_X 8 56#define TCP_DIALOG_WIDTH COLS - 16 57#define TCP_DIALOG_HEIGHT LINES - 2 58 59static Layout layout[] = { 60#define LAYOUT_HOSTNAME 0 61 { 1, 2, 25, HOSTNAME_FIELD_LEN - 1, 62 "Host:", "Your fully-qualified hostname, e.g. foo.bar.com", 63 hostname, STRINGOBJ, NULL }, 64#define LAYOUT_DOMAINNAME 1 65 { 1, 35, 20, HOSTNAME_FIELD_LEN - 1, 66 "Domain:", 67 "The name of the domain that your machine is in, e.g. bar.com", 68 domainname, STRINGOBJ, NULL }, 69#define LAYOUT_GATEWAY 2 70 { 5, 2, 18, IPADDR_FIELD_LEN - 1, 71 "Gateway:", 72 "IP address of host forwarding packets to non-local destinations", 73 gateway, STRINGOBJ, NULL }, 74#define LAYOUT_NAMESERVER 3 75 { 5, 35, 18, IPADDR_FIELD_LEN - 1, 76 "Name server:", "IP address of your local DNS server", 77 nameserver, STRINGOBJ, NULL }, 78#define LAYOUT_IPADDR 4 79 { 10, 10, 18, IPADDR_FIELD_LEN - 1, 80 "IP Address:", 81 "The IP address to be used for this interface", 82 ipaddr, STRINGOBJ, NULL }, 83#define LAYOUT_NETMASK 5 84 { 10, 35, 18, IPADDR_FIELD_LEN - 1, 85 "Netmask:", 86 "The netmask for this interface, e.g. 0xffffff00 for a class C network", 87 netmask, STRINGOBJ, NULL }, 88#define LAYOUT_EXTRAS 6 89 { 14, 10, 37, HOSTNAME_FIELD_LEN - 1, 90 "Extra options to ifconfig:", 91 "Any interface-specific options to ifconfig you would like to add", 92 extras, STRINGOBJ, NULL }, 93#define LAYOUT_OKBUTTON 7 94 { 19, 15, 0, 0, 95 "OK", "Select this if you are happy with these settings", 96 &okbutton, BUTTONOBJ, NULL }, 97#define LAYOUT_CANCELBUTTON 8 98 { 19, 35, 0, 0, 99 "CANCEL", "Select this if you wish to cancel this screen", 100 &cancelbutton, BUTTONOBJ, NULL }, 101 { NULL }, 102}; 103 104#define _validByte(b) ((b) >= 0 && (b) <= 255) 105 106/* whine */ 107static void 108feepout(char *msg) 109{ 110 beep(); 111 msgConfirm(msg); 112} 113 114/* Very basic IP address integrity check - could be drastically improved */ 115static int 116verifyIP(char *ip) 117{ 118 int a, b, c, d; 119 120 if (ip && sscanf(ip, "%d.%d.%d.%d", &a, &b, &c, &d) == 4 && 121 _validByte(a) && _validByte(b) && _validByte(c) && 122 _validByte(d) && (d != 255)) 123 return 1; 124 else 125 return 0; 126} 127 128/* Check for the settings on the screen - the per-interface stuff is 129 moved to the main handling code now to do it on the fly - sigh */ 130static int 131verifySettings(void) 132{ 133 if (!hostname[0]) 134 feepout("Must specify a host name of some sort!"); 135 else if (gateway[0] && strcmp(gateway, "NO") && !verifyIP(gateway)) 136 feepout("Invalid gateway IP address specified"); 137 else if (nameserver[0] && !verifyIP(nameserver)) 138 feepout("Invalid name server IP address specified"); 139 else if (netmask[0] && (netmask[0] < '0' && netmask[0] > '3')) 140 feepout("Invalid netmask value"); 141 else if (ipaddr[0] && !verifyIP(ipaddr)) 142 feepout("Invalid IP address"); 143 else 144 return 1; 145 return 0; 146} 147 148/* This is it - how to get TCP setup values */ 149int 150tcpOpenDialog(Device *devp) 151{ 152 WINDOW *ds_win, *save = NULL; 153 ComposeObj *obj = NULL; 154 int n = 0, cancel = FALSE; 155 int max, ret = DITEM_SUCCESS; 156 char *tmp; 157 char title[80]; 158 159 /* Initialise vars from previous device values */ 160 if (devp->private) { 161 DevInfo *di = (DevInfo *)devp->private; 162 163 SAFE_STRCPY(ipaddr, di->ipaddr); 164 SAFE_STRCPY(netmask, di->netmask); 165 SAFE_STRCPY(extras, di->extras); 166 } 167 else { /* See if there are any defaults */ 168 char *cp; 169 170#ifdef notdef /* This is just a test stub which doesn't work yet either */ 171 /* First try a DHCP scan */ 172 msgNotify("Scanning for DHCP servers..."); 173 Mkdir("/var/db"); 174 vsystem("ifconfig %s inet 0.0.0.0 netmask 0.0.0.0 broadcast 255.255.255.255 up", devp->name); 175 if (!vsystem("dhclient")) { 176 msgConfirm("Successful return from dhclient"); 177 } 178 else 179 msgConfirm("Unsuccessful return from dhclient"); 180#endif 181 182 /* Get old IP address from variable space, if available */ 183 if (!ipaddr[0]) { 184 if ((cp = variable_get(VAR_IPADDR)) != NULL) 185 SAFE_STRCPY(ipaddr, cp); 186 else if ((cp = variable_get(string_concat3(devp->name, "_", VAR_IPADDR))) != NULL) 187 SAFE_STRCPY(ipaddr, cp); 188 } 189 190 /* Get old netmask from variable space, if available */ 191 if (!netmask[0]) { 192 if ((cp = variable_get(VAR_NETMASK)) != NULL) 193 SAFE_STRCPY(netmask, cp); 194 else if ((cp = variable_get(string_concat3(devp->name, "_", VAR_NETMASK))) != NULL) 195 SAFE_STRCPY(netmask, cp); 196 } 197 198 /* Get old extras string from variable space, if available */ 199 if (!extras[0]) { 200 if ((cp = variable_get(VAR_EXTRAS)) != NULL) 201 SAFE_STRCPY(extras, cp); 202 else if ((cp = variable_get(string_concat3(devp->name, "_", VAR_EXTRAS))) != NULL) 203 SAFE_STRCPY(extras, cp); 204 } 205 } 206 207 /* Look up values already recorded with the system, or blank the string variables ready to accept some new data */ 208 tmp = variable_get(VAR_HOSTNAME); 209 if (tmp) 210 SAFE_STRCPY(hostname, tmp); 211 else 212 bzero(hostname, sizeof(hostname)); 213 tmp = variable_get(VAR_DOMAINNAME); 214 if (tmp) 215 SAFE_STRCPY(domainname, tmp); 216 else 217 bzero(domainname, sizeof(domainname)); 218 tmp = variable_get(VAR_GATEWAY); 219 if (tmp) 220 SAFE_STRCPY(gateway, tmp); 221 else 222 bzero(gateway, sizeof(gateway)); 223 tmp = variable_get(VAR_NAMESERVER); 224 if (tmp) 225 SAFE_STRCPY(nameserver, tmp); 226 else 227 bzero(nameserver, sizeof(nameserver)); 228 229 save = savescr(); 230 /* If non-interactive, jump straight over the dialog crap and into config section */ 231 if (variable_get(VAR_NONINTERACTIVE) && 232 !variable_get(VAR_NETINTERACTIVE)) { 233 if (!hostname[0]) 234 msgConfirm("WARNING: hostname variable not set and is a non-optional\n" 235 "parameter. Please add this to your installation script\n" 236 "or set the netInteractive variable (see sysinstall man page)"); 237 else 238 goto netconfig; 239 } 240 241 /* Now do all the screen I/O */ 242 dialog_clear_norefresh(); 243 244 /* We need a curses window */ 245 if (!(ds_win = openLayoutDialog(TCP_HELPFILE, " Network Configuration ", 246 TCP_DIALOG_X, TCP_DIALOG_Y, TCP_DIALOG_WIDTH, TCP_DIALOG_HEIGHT))) { 247 beep(); 248 msgConfirm("Cannot open TCP/IP dialog window!!"); 249 restorescr(save); 250 return DITEM_FAILURE; 251 } 252 253 /* Draw interface configuration box */ 254 draw_box(ds_win, TCP_DIALOG_Y + 9, TCP_DIALOG_X + 8, TCP_DIALOG_HEIGHT - 13, TCP_DIALOG_WIDTH - 17, 255 dialog_attr, border_attr); 256 wattrset(ds_win, dialog_attr); 257 sprintf(title, " Configuration for Interface %s ", devp->name); 258 mvwaddstr(ds_win, TCP_DIALOG_Y + 9, TCP_DIALOG_X + 14, title); 259 260 /* Some more initialisation before we go into the main input loop */ 261 obj = initLayoutDialog(ds_win, layout, TCP_DIALOG_X, TCP_DIALOG_Y, &max); 262 263reenter: 264 cancelbutton = okbutton = 0; 265 while (layoutDialogLoop(ds_win, layout, &obj, &n, max, &cancelbutton, &cancel)) { 266 /* Insert a default value for the netmask, 0xffffff00 is 267 the most appropriate one (entire class C, or subnetted 268 class A/B network). */ 269 if (netmask[0] == '\0') { 270 strcpy(netmask, "255.255.255.0"); 271 RefreshStringObj(layout[LAYOUT_NETMASK].obj); 272 } 273 if (!index(hostname, '.') && domainname[0]) { 274 strcat(hostname, "."); 275 strcat(hostname, domainname); 276 RefreshStringObj(layout[LAYOUT_HOSTNAME].obj); 277 } 278 else if (((tmp = index(hostname, '.')) != NULL) && !domainname[0]) { 279 SAFE_STRCPY(domainname, tmp + 1); 280 RefreshStringObj(layout[LAYOUT_DOMAINNAME].obj); 281 } 282 } 283 284 if (!cancel && !verifySettings()) 285 goto reenter; 286 287 /* Clear this crap off the screen */ 288 delwin(ds_win); 289 dialog_clear_norefresh(); 290 use_helpfile(NULL); 291 292 /* We actually need to inform the rest of sysinstall about this 293 data now if the user hasn't selected cancel. Save the stuff 294 out to the environment via the variable_set() mechanism */ 295 296netconfig: 297 if (!cancel) { 298 DevInfo *di; 299 char temp[512], ifn[255]; 300 char *ifaces; 301 302 variable_set2(VAR_HOSTNAME, hostname, 1); 303 sethostname(hostname, strlen(hostname)); 304 if (domainname[0]) 305 variable_set2(VAR_DOMAINNAME, domainname, 0); 306 if (gateway[0]) 307 variable_set2(VAR_GATEWAY, gateway, 1); 308 if (nameserver[0]) 309 variable_set2(VAR_NAMESERVER, nameserver, 0); 310 311 if (!devp->private) 312 devp->private = (DevInfo *)safe_malloc(sizeof(DevInfo)); 313 di = devp->private; 314 SAFE_STRCPY(di->ipaddr, ipaddr); 315 SAFE_STRCPY(di->netmask, netmask); 316 SAFE_STRCPY(di->extras, extras); 317 318 sprintf(temp, "inet %s %s netmask %s", ipaddr, extras, netmask); 319 sprintf(ifn, "%s%s", VAR_IFCONFIG, devp->name); 320 variable_set2(ifn, temp, 1); 321 ifaces = variable_get(VAR_INTERFACES); 322 if (!ifaces) 323 variable_set2(VAR_INTERFACES, ifaces = "lo0", 1); 324 /* Only add it if it's not there already */ 325 if (!strstr(ifaces, devp->name)) { 326 sprintf(ifn, "%s %s", devp->name, ifaces); 327 variable_set2(VAR_INTERFACES, ifn, 1); 328 } 329 if (ipaddr[0]) 330 variable_set2(VAR_IPADDR, ipaddr, 0); 331 configResolv(NULL); /* XXX this will do it on the MFS copy XXX */ 332 ret = DITEM_SUCCESS; 333 } 334 else 335 ret = DITEM_FAILURE; 336 restorescr(save); 337 return ret; 338} 339 340static Device *NetDev; 341 342static int 343netHook(dialogMenuItem *self) 344{ 345 Device **devs; 346 347 devs = deviceFindDescr(self->prompt, self->title, DEVICE_TYPE_NETWORK); 348 if (devs) { 349 if (DITEM_STATUS(tcpOpenDialog(devs[0])) != DITEM_FAILURE) 350 NetDev = devs[0]; 351 else 352 NetDev = NULL; 353 } 354 return devs ? DITEM_LEAVE_MENU : DITEM_FAILURE; 355} 356 357/* Get a network device */ 358Device * 359tcpDeviceSelect(void) 360{ 361 DMenu *menu; 362 Device **devs, *rval; 363 int cnt; 364 365 devs = deviceFind(NULL, DEVICE_TYPE_NETWORK); 366 cnt = deviceCount(devs); 367 rval = NULL; 368 369 if (!cnt) { 370 msgConfirm("No network devices available!"); 371 return NULL; 372 } 373 else if (!RunningAsInit) { 374 if (!msgYesNo("Running multi-user, assume that the network is already configured?")) 375 return devs[0]; 376 } 377 if (cnt == 1) { 378 if (DITEM_STATUS(tcpOpenDialog(devs[0]) == DITEM_SUCCESS)) 379 rval = devs[0]; 380 } 381 else if (variable_get(VAR_NONINTERACTIVE) && variable_get(VAR_NETWORK_DEVICE)) { 382 devs = deviceFind(variable_get(VAR_NETWORK_DEVICE), DEVICE_TYPE_NETWORK); 383 cnt = deviceCount(devs); 384 if (cnt) { 385 if (DITEM_STATUS(tcpOpenDialog(devs[0]) == DITEM_SUCCESS)) 386 rval = devs[0]; 387 } 388 } 389 else { 390 int status; 391 392 menu = deviceCreateMenu(&MenuNetworkDevice, DEVICE_TYPE_NETWORK, netHook, NULL); 393 if (!menu) 394 msgFatal("Unable to create network device menu! Argh!"); 395 status = dmenuOpenSimple(menu, FALSE); 396 free(menu); 397 if (status) 398 rval = NetDev; 399 } 400 return rval; 401} 402 403/* Do it from a menu that doesn't care about status */ 404int 405tcpMenuSelect(dialogMenuItem *self) 406{ 407 Device *tmp; 408 409 tmp = tcpDeviceSelect(); 410 if (tmp && !msgYesNo("Would you like to bring the %s interface up right now?", tmp->name)) 411 if (!tmp->init(tmp)) 412 msgConfirm("Initialization of %s device failed.", tmp->name); 413 return DITEM_SUCCESS | DITEM_RESTORE; 414} 415